Brake Linings And Drums - Subaru 2002 IMPREZA Service Manual

PERIODIC MAINTENANCE SERVICES

22.Brake Linings and Drums

A: INSPECTION
1. REAR DRUM BRAKE
1) Remove the brake drum, and check that there is
no fluid leakage from wheel cylinder.
If there is fluid leakage from wheel cylinder, replace
it.
2) Inspect the brake shoes for damage or deformi-
ties and check brake linings for wear.
NOTE:
• Always replace both leading and trailing brake
shoes for the right and left wheels at the same time.
• When either the right and left brake assembly is
replaced, always replace the leading shoe and trail-
ing shoe of the other.
• The cotter pin, once removed, cannot be reused.
Thickness of lining (except back metal)
Standard value: 4.1 mm (0.161 in)
Service limit: 1.5 mm (0.059 in)
(1) Rotational direction of drum (Forward)
(2) Wheel cylinder
(3) Upper shoe return spring
(4) Adjusting lever
(5) Trailing shoe
(6) Lower shoe return spring
(7) Leading shoe
To replace the trailing shoe, remove the cotter pin.
Clevis pin should also be replaced if worn.
BRAKE LININGS AND DRUMS
GI0059A
PM-34
3) Check the brake drum for wear, dents or other
damage.
If the inside surface of brake drum is streaked, cor-
rect the surface with emery cloth (#200 or more). If
it is unevenly worn, tapered, or the outside surface
of brake drum is damaged, correct or replace it.
Brake drum inner diameter
Standard value: 228.6 mm (9.000 in)
Service limit: 230.6 mm (9.079 in)
If deformation or wear of back plate, shoe, etc. is
noticeable, replace the affected parts.
2. PARKING BRAKE (REAR DISC BRAKE)
Inspect the brake linings and drums of both sides of
the rear brake at the same time by removing brake
drums.
1) Inspect the brake shoes for damage or deforma-
tion and check brake linings for wear.
NOTE:
Always replace both primary and secondary brake
shoes for the right and left wheels at the same time.
Brake lining thickness excluding back metal
Standard value: 3.2 mm (0.126 in)
Wear limit: 1.5 mm (0.059 in)
GI0060A
GI0061A